Question about Homelite Mighty Lite Lawn Trimmer

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Homelite ut21546 runs only with choke 1/2 on. Where are the mixture screws?

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Usually they are under plastic caps that limit thier movement. there should be an H and L on the side of the carb. certain carbs these days are preset and have no adjustments which you must clean the carb extremely good to make it perform good again.

Posted on May 04, 2010

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Choke problem


That's an indication that the idle mixture is too lean, as the choke richens up the mixture, allowing it to run.

Your carb should be similar to this:

http://www5.picturepush.com/photo/a/3728808/img/3728808.jpg

The AIR SCREW adjusts the mixture (rich/lean), and the IDLE SCREW adjusts the idle SPEED.

Try screwing in the AIR SCREW 1/2 a turn and see if that helps.
If not, try another 1/2 turn.

Still no idle?

Turn the screw back where it was (1 full turn) and then screw it OUT 1/2 turn, then if not, another 1/2 turn.

Once you have the mixture correct, the idle speed can be set with the IDLE SCREW.

Jan 11, 2014 | 2003 ATK 125 4-stroke

1 Answer

I have the MightyLite 26bv....will only run at half choke. When turn knob to run, it dies. Does not reach full power ever.


The parts inside the carburetor need to be replaced (gasket and diaphragm kit) and/or the L and H screws need to be adjusted on the carb. Try grasping and turning the L mixture screw on the carburetor (one closest to engine) about 1/8 to 1/4 of a turn counterclockwise.

Jul 01, 2011 | Homelite Consumer Products MightyLite...

1 Answer

Homelite string gas trimmer Model ut20811A: 1. Will start with full choke and run with full choke for a while but will not maintain speed when choke is released. 2. String feed will not feed when taped....


If it only runs with choke on, then mixture is too lean or idle set to low.
Adjust mixture initially at 1.5 turns, then move in or out as needed for highest idle when warm.
Make sure no leaks or clogged filter when adjusting.

Hard to say with string feed, but are you sure you are not putting the spool in backwards?

Mar 12, 2011 | Homelite Garden

2 Answers

Correct start proceedure


Hello,
My name is Dane and I am going to help you solve your problem.
I don't know what homelite says, but I have found that this works well on any 2 cycle engine.
1. Push the primer bulb between 3 to 5 times.
2. Place choke on full.
3. Pull rope until engine fires once or starts.
4. Move choke to half choked position and allow to warm up.
5. When warm place choke in run position

If it doesn't attempt to start within the first 3-6 pulls, check your spark plug and make sure your fuel/oil mixture is correct.
I hope I've helped! Thank you! Dane

Dec 26, 2010 | Homelite Mighty Lite Lawn Trimmer

1 Answer

Trimmers: Homelite Easy Reach-25cc-Model # UT20044B& Homelite Mighty Lite- 26cc- Model # UT21546 Both trimmers will start but when throttling up they cut out. They will also cut out when the choke is...


sounds like an air/ fuel mixture/ratio problem.there should be two screws side by side near the carb. crank trimmer and slowly adjust screws, in or out, till engine runs smoothly..

Sep 08, 2010 | Homelite Mighty Lite Lawn Trimmer

1 Answer

It won't run prorerly


I had the same problem. I took it to the dumpster and used my old echo that I purchased in 1986. The Homelite was 2 years old. My sugesstion is to dump it.

Apr 06, 2010 | Homelite Mighty Lite Lawn Trimmer

1 Answer

I have a Homelite UT08580 26cc MightyLite Backpack Blower. Since new it has run poorly if at all when the choke is in the run position. Normally I have to use it when in the 1/2 choke position. It has caps...


If you have'nt yet you should put a kit in the carborater,if that does'nt fix it{should} then you may have a plugged muffler,.if you can't get rid of exhaust you can't be reved up.

Dec 09, 2009 | Homelite Consumer Products Backpack...

2 Answers

Does not run at full speed unless choke is at 1/4 setting. I checked the air screen and it is clear. I replaced the gas with new fuel 50:1 mix.


its a blocked carb or filter
clean out all the fule pipes and filters
"""even the one in the fule tank on the end of the pick up pipe""" and retune carb when starting up again
ps,, iv never liked running on a 50:1 mix?
i do 40:1 if it smokes a little ,,,,,its got oil in it!

Oct 27, 2009 | Homelite Consumer Products MightyLite...

1 Answer

Stales out when u take the choke off must run with full choke on


You will need to take to a shop and have the technician adjust the carburetor. Plus I recommend mixing your fuel mixture at 40:1(3.2 oz 2 cycle oil to 1 gallon of gas) instead of the 50:1(2.6 oz 2 cycle oil to 1 gallon of gas). If your fuel mixture is over 30 days old, it is considered bad gas.
All the manufacturers I have heard from this year have made this knowledge known.
Good Day.

Oct 08, 2009 | Homelite ZR40502 Factory-Reconditioned...

1 Answer

Correct gas to oil ratio for Homelite Mighty String Trimmer Model


most trimmers are 50:1. or 40:1. i would use synthetic 2 cycle oil and use the 50:1 ratio. i know guys with trimmers that require 50:1, and they use synthetic at 80:1 with no problems for years. they say the engine runs cleaner. i am a part-time lawn care operator.

Jun 18, 2009 | Homelite Mighty Lite Lawn Trimmer

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